ra288.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/float_dsp.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "avcodec.h"
#include "celp_filters.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
#include "lpc_functions.h"
#include "ra288.h"
#include "g728_template.c"

Go to the source code of this file.

Data Structures
struct	RA288Context

Macros
#define	BITSTREAM_READER_LE
#define	MAX_BACKWARD_FILTER_ORDER   36
#define	MAX_BACKWARD_FILTER_LEN   40
#define	MAX_BACKWARD_FILTER_NONREC   35
#define	ATTEN   0.5625
#define	RA288_BLOCK_SIZE   5
#define	RA288_BLOCKS_PER_FRAME   32

Functions
static av_cold int	ra288_decode_init (AVCodecContext *avctx)
static void	decode (RA288Context *ractx, float gain, int cb_coef)
static void	backward_filter (RA288Context *ractx, float *hist, float *rec, const float *window, float *lpc, const float *tab, int order, int n, int non_rec, int move_size)
	Backward synthesis filter, find the LPC coefficients from past speech data.
static int	ra288_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)

Variables
const FFCodec	ff_ra_288_decoder

Macro Definition Documentation

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 28 of file ra288.c.

MAX_BACKWARD_FILTER_ORDER

#define MAX_BACKWARD_FILTER_ORDER   36

Definition at line 37 of file ra288.c.

MAX_BACKWARD_FILTER_LEN

#define MAX_BACKWARD_FILTER_LEN   40

Definition at line 38 of file ra288.c.

MAX_BACKWARD_FILTER_NONREC

#define MAX_BACKWARD_FILTER_NONREC   35

Definition at line 39 of file ra288.c.

ATTEN

#define ATTEN   0.5625

Definition at line 40 of file ra288.c.

RA288_BLOCK_SIZE

#define RA288_BLOCK_SIZE   5

Definition at line 43 of file ra288.c.

Referenced by ra288_decode_frame().

RA288_BLOCKS_PER_FRAME

#define RA288_BLOCKS_PER_FRAME   32

Definition at line 44 of file ra288.c.

Referenced by ra288_decode_frame().

Function Documentation

ra288_decode_init()

static av_cold int ra288_decode_init ( AVCodecContext * avctx )

static

Definition at line 69 of file ra288.c.

decode()

static void decode ( RA288Context * ractx, float gain, int cb_coef )

static

Definition at line 92 of file ra288.c.

Referenced by ra288_decode_frame().

backward_filter()

static void backward_filter ( RA288Context * ractx, float * hist, float * rec, const float * window, float * lpc, const float * tab, int order, int n, int non_rec, int move_size )

static

Backward synthesis filter, find the LPC coefficients from past speech data.

Definition at line 132 of file ra288.c.

Referenced by ra288_decode_frame().

ra288_decode_frame()

static int ra288_decode_frame ( AVCodecContext * avctx, AVFrame * frame, int * got_frame_ptr, AVPacket * avpkt )

static

Definition at line 147 of file ra288.c.

Variable Documentation

ff_ra_288_decoder

const FFCodec ff_ra_288_decoder

Initial value:

= {
    .p.name         = "real_288",
    CODEC_LONG_NAME("RealAudio 2.0 (28.8K)"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_RA_288,
    .priv_data_size = sizeof(RA288Context),
    .init           = ra288_decode_init,
    FF_CODEC_DECODE_CB(ra288_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
}

Definition at line 197 of file ra288.c.